You only wanted to play two levels, right?
Sonic Forces has already had a bit of an uphill battle to face releasing after Sonic Mania, but it looks like PC users are going to have an even rougher time of it. Thanks to the magic of Denuvo DRM, most users can’t even progress past the second level in the game. Upon reaching the first mission with your custom avatar, the game promptly crashes with little explanation. Sega has been diligent in quickly issuing a patch, at least.
Another big problem comes from some messed up calculations with the framerate limiter. For some reason, capping the framerate at 60 results in the game playing at half speed, around roughly 32 FPS. Using the 30 FPS cap results in 22 frames per second, which is what the cutscenes are locked to. As you can clearly tell from just a numerical standpoint, this is making things look ultra weird for a lot of people. At least Forces has an unlocked framerate option, but cutscenes are pretty much busted for the time being.
Hopefully Sega gets out some more fixes in the near future, because the current Steam user ratings for Sonic Forces are mostly negative. I know with a lot of PC ports, issues can come down to user hardware configurations. It can be hard to determine whether a person experiencing slowdown or crashes is having a legitimate problem or something on their end. An issue like crashes based on Denuvo, though, is something that should have been noticeable to anyone in the QA department.
[Thanks to DC2912 for the tip]